filler neck recommendations

[Mandi Engineering]

In process of constructing my aluminum tank for the motorcycle and curious what is the best filler neck option style..flip top, screw top, etc.

[manta22]

Flip tops are too easy to open accidentally in a crash unless they are safety wired shut.

Regards, Neil  Tucson, AZ

[salt27]

I don't know what is best but we used a screw cap when we built our aluminum tank.

  Don

[wobblywalrus]

A good feature is to have the opening big enough so you can see the fuel level when the tank gets close to full.  The screw top, as said earlier, is safest.  It will not flip open.